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M27W401-120XN6TR Fiches technique(PDF) 7 Page - STMicroelectronics

No de pièce M27W401-120XN6TR
Description  4 Mbit 512Kb x 8 Low Voltage UV EPROM and OTP EPROM
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M27W401-120XN6TR Fiches technique(HTML) 7 Page - STMicroelectronics

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M27W401
Table 9. Programming Mode DC Characteristics (1)
(TA =25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
Table 10. Programming Mode AC Characteristics (1)
(TA =25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
2. Sampled only, not 100% tested.
Symbol
Parameter
Test Condition
Min
Max
Unit
ILI
Input Leakage Current
0V
≤ VIN ≤ VCC
±10
µA
ICC
Supply Current
50
mA
IPP
Program Current
E= VIL
50
mA
VIL
Input Low Voltage
–0.3
0.8
V
VIH
Input High Voltage
2
VCC + 0.5
V
VOL
Output Low Voltage
IOL = 2.1mA
0.4
V
VOH
Output High Voltage TTL
IOH = –400µA
2.4
V
VID
A9 Voltage
11.5
12.5
V
Symbol
Alt
Parameter
Test Condi tion
Min
Max
Unit
tAVEL
tAS
Address Valid to Chip Enable Low
2
µs
tQVEL
tDS
Input Valid to Chip Enable Low
2
µs
tVPHEL
tVPS
VPP High to Chip Enable Low
2
µs
tVCHEL
tVCS
VCC High to Chip Enable Low
2
µs
tELEH
tPW
Chip Enable Program Pulse Width
95
105
µs
tEHQX
tDH
Chip Enable High to Input Transition
2
µs
tQXGL
tOES
Input Transition to Output Enable Low
2
µs
tGLQV
tOE
Output Enable Low to Output Valid
100
ns
tGHQZ
tDFP
Output Enable High to Output Hi-Z
0
130
ns
tGHAX
tAH
Output Enable High to Address
Transition
0ns
ming ’0’s into the desired bit locations. Although
only ’0’s will be programmed, both ’1’s and ’0’s can
be present in the data word. The only way to
change a ‘0’ to a ‘1’ is by die exposure to ultraviolet
light (UV EPROM). The M27W401 is in the pro-
gramming mode when VPP input is at 12.75V, G is
at VIH and E is pulsed to VIL. The data to be pro-
grammed is applied to 8 bits in parallel to the data
output pins. The levels required for the address
and data inputs are TTL. VCC is specified to be
6.25V
± 0.25V
Programming
The M27W401 has been designed to be fully com-
patible with the M27C4001 and has the same elec-
tronic signature. As a result the M27W401 can be
programmed as the M27C4001 on the same pro-
gramming equipment applying 12.75V on VPP and
6.25V on VCC by the use of the same PRESTO II
algorithm.
When delivered (and after each ‘1’s erasure for UV
EPROM), all bits of the M27W401 are in the ’1’
state. Data is introduced by selectively program-


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